*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: #f0f2f5;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: 20px;
}

h1 { font-size: 2.5rem; color: #667eea; margin-bottom: 10px; }
p  { color: #666; font-size: 1.1rem; }